Mercer County is in Great Lakes & Wilds Pennsylvania. Of the 67 counties in the state, Mercer County ranks 33rd in terms of size (436,867 acres). Mercer County, Pennsylvania, includes almost 1,000 acres of farms for sale based on recent Land Network data. The combined market value of farmsand rural real estate for sale here was approximately $4 million. The average price of farmland for sale in Mercer County was $330,269. Farms for sale in Mercer County feature livestock including horses, cattle, sheep, pig and goats. Browse all Pennsylvania farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future business or individual needs.